Home / 34,139.10-51,208.65-20,142.30

Finding the Fourth Proportional to 34,139.10, 51,208.65 and 20,142.30

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Solution

The fourth proportional to 34,139.10, 51,208.65 and 20,142.30 is: 30,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,139.10 : 51,208.65 = 20,142.30 : x
  2. Step 2: Convert to fraction form
    34,139.10/51,208.65 = 20,142.30/x
  3. Step 3: Cross multiply
    34,139.10x = 51,208.65 × 20,142.30
  4. Step 4: Simplify right side
    34,139.10x = 1,031,459,990.90
  5. Step 5: Solve for x
    x = 1,031,459,990.90/34,139.10
  6. Step 6: Final answer
    x = 30,213.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.